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How to Carbonate Beer in Kegs



WHAT IS CARBONATION?

In general, carbonation is described in terms of volumes of carbon dioxide, or CO2 for short. There is a lot of argument about the actual meaning of this term but needless to say, the more volumes of gas the more carbonated the liquid will be. For example, English cask beer can be about 1.5 volumes whereas say champagne can be up towards 7.0 volumes. Other parts of the world use grams/Liter of which there are about 2.0g/L per volume of CO2.

Quite simply, CO2 is soluble in a solution in an inverse relationship to the temperature of the solution. What this means is that the colder the liquid is the more CO2 can be held in solution. This is very important when you get to calculating your volumes of CO2 because the colder your finished beverage is the more residual CO2 will be in solution. This is one of the main reasons that beers are over-carbonated. Read more about why you could have an over-carbonated beer.




HOW TO CARBONATE BEER IN A KEG

Carbonating your beer, cider, or soda in kegs can be simple, easy, and quick. There are a few things to know in advance, and a few different methods. This guide will go over them for you.

Before we begin, make sure you have the necessary equipment for carbonating a keg.

  • Have your beer transferred to a keg.

  • Make sure you have the necessary tubing and keg disconnects for the gas and liquid.

  • The C02 Gas Cylinder

  • The C02 beer regulator for adjusting carbonation levels

  • A force carbonation chart to ensure perfect carbonation

FORCE CARBONATION

Most carbonation in kegs is done using pressurized CO2 from a gas cylinder, a process called force carbonation. The fastest results can be achieved when the beer in the keg is at a cold temperature. This will let the CO2 diffuse into the beer more efficiently and at a faster rate.

The most accurate and easiest method for force carbonating is often referred to as the “set it and forget it method.” Select your refrigerator temperature and your desired carbonation rate set your CO2 regulator to that pressure, and wait 5-10 days for the beer to carbonate.

FORCE CARBONATE YOUR BEER FASTER

A more accelerated method of force carbonation involves putting 30-40 PSI of CO2 into your chilled keg of beer and shaking or rocking the keg to diffuse the gas at a faster rate. Depending on how cold your beer is, and how much you agitate the beer, you can have your beer carbonated anywhere from 12 hours to 3 days. Once it is carbonated, dial your CO2 regulator down to serving pressure, and vent excess CO2 out of your keg. It is advised that you wait an hour or two for the beer to settle down before serving.

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